/*
 * Copyright (c) 2013, marco.tamburelli@gmail.com
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met: 
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer. 
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.omorphdb.core.value;

import org.omorphdb.core.io.Constants;
import org.omorphdb.core.storage.document.Document;

public class ObjectValue implements Value<Document>
{
	private final Document value;

	public ObjectValue(Document value)
	{
		this.value = value;
	}

	@Override
	public ValueType getType()
	{
		return ValueType.DOCUMENT;
	}

	@Override
	public Class<Document> getJavaType()
	{
		return Document.class;
	}

	@Override
	public Document get()
	{
		return this.value;
	}

	/**
	 * In this case the size that should be reserved for this element is just
	 * the size of a long. This because the real size of the enclosed document
	 * is required when the document will be saved or updated.
	 */
	@Override
	public int size()
	{
		return Constants.SIZEOF_LONG + 1;
	}

	@Override
	public boolean equals(Object value)
	{
		if (value instanceof ObjectValue)
		{
			ObjectValue value2 = (ObjectValue) value;
			if (this.value == null) return value == null || value2.get() == null;

			return this.value.equals(value2.get());
		}

		return false;
	}

	@Override
	public boolean isNull()
	{
		return this.value == null;
	}

	@Override
	public ObjectValue clone()
	{
		// FIXME A proper implementation of a method to replicate a document
		// could be required.
		return new ObjectValue(this.value);
	}
}
